Physics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jqsrt..15.1141e&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 15, Dec. 1975, p. 1141-1144.
Physics
1
Absorption Spectra, Line Spectra, Optical Resonance, Optical Thickness, Spectral Line Width, Density Distribution, Doppler Effect, Spectrum Analysis
Scientific paper
The conflicting results describing the relationship between line width and absorber density in resonance broadening are considered. A reexamination of some of these experiments points to a common difficulty - large optical depth. Formulas are given which approximate the widths and dependencies observed under optically thick conditions. It is concluded that a resonance breadth which is linear with density is consistent with all of the observations and that there is no solid basis for a square root dependence at low density.
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